In constructia originala , tubul culisant al portocularului intra in fasciculul de lumina al oglinzii principale.Initially ,the draw tube of the focuser was obstructing the light of the primary mirror.

Am rezolvat aceasta obstructionare suparatoare taind tubul culisant al portocularului imediat la capatul dinspre oglinda secundara a cremalierei .I solved this annoying obstruction by cutting the draw tube of the focuser right at the end of the rack next to the secondary mirror.